System for feeding water to a steam generator



p l 1936. M. c. TREMBLAY 2,039,265

SYSTEM FOR FEEDING WATER TO A STEAM GENERATOR Filed June 2'7, 1935 2 Sheets-Sheet l I nvenlor einbia M 7 M 64/ j A Home April 28, 1936, M. c. TREMBLAY 2,039,265

SYSTEM FOR FEEDING WATER TO A STEAM GENERATOR 2 Sheets-Sheet 2 Filed June 27, 1935' Invenlor 1. 6: 1 12 22232? fl/ Patented Apr. 28, 1936 PATENT OFFICE SYSTEM FOR FEEDING WATER TO A STEAM GENERATOR Miles 0. Tremblay,rLewiston, Maine, assignor ofone-fourth to Fred E. Clark, Mechanic Falls, and one-fourth to Percy L. Clarry, Lewiston,

Maine Application June 2'7, 1935, Serial No. 28,784

2 Claims.

This invention relates to a system for feeding water to a steam generator, the general object of the invention being to provide means for feeding the water to the generator without the use of 5 pumps, inspirators and injectors or the like, by means of steam pressure or the like and gravity.

This invention also consists in certain other features of construction and in the combination and arrangement of several parts, to be herein- 10 after fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings where- 15 in like characters denote like or corresponding parts throughout the several views, and in which:--

Figure l is an elevational diagrammatic view with parts in section of the invention. 2 Figure 2 is a vertical sectional view through the lower tank.

Figure 3 is a vertical sectional View through the upper valve.

Figure 4 is a section on the line 4-4 of Figure 3.

In these drawings the letter A indicates the steam generator, the boiler of which is shown at I in dotted lines, and the numeral 2 indicates a a tank which is located above the high water level of the boiler and is connected to the boiler by a pipe 3 extending from the bottom of the tank and contains a check valve 4 which opens toward the boiler. A second tank 5 is connected by a pipe 6 with a gravity water supply and said pipe contains a valve 1 which opens toward the tank 5. A valve casing 8 is divided into upper and lower chambers by a valve seat 9, the lower chamber being in communication with the top of the tank 5 by a pipe l0 and said lower chamber is provided with a discharge II in its bottom which is normally held closed by a spring-pressed valve l2, the valve opening downwardly.

A second valve casing I3 is arranged above the casing 8 and is divided into upper and lower chambers by a valve seat l4 for a valve 15 attached to a stem I6. The top of the casing I3 is formed with a discharge nipple l'l having a valve seat I8 in its top for a valve I9 which is formed on the upper end of the stem l6 and a spring 28 bearing against a collar 2| on the stem above the valve l5 and against a spider 22 in the nipple I! tend to hold the valve IS on the seat l8 and the valve I5 off of the seat l4. A cylinder 23 is located between the valve casings 8 and I3 and contains a piston 24 which is connected to the lower nect the line with the casing l3 below the parti- 10 tion l4 and with the casing 8 above the seat or partition 9. A pipe 35 connects the upper chamber of the casing [3 with the top of the tank 2 and a pipe 38 connects the bottom of the tank 5 with the upper portion of the tank 2 and contains a check valve 31 which closes toward the tank 5.

A float 38 is located in the tank 5 and operates on a rod 39 between the upper and lower stops 40, the rod being connected with the valve 21 as shown in Figure 1.

The water enters the tank 5 under the action of gravity through the pipe 6 and by the check valve 1. The water will lift the float 38 and when the float strikes the upper stop 48 the rod 39 will shift the valve 21 so that steam will flow from the chest 3! through the passage 29 into the lower part of the cylinder 33, the steam above the piston 24 passing to exhaust through the passage 28 and the port 30. Thus the piston 24 will be raised so that the valve 26 will be raised in the casing 8 and the valve l5 will be seated in the casing l3 and the valve l9 will open the exhaust of this casing l3. As the stem raises the spring will close the valve l2 and steam will flow through the casing 8 and pipe l0 into the top of the tank 5 so that the water in the tank will be forced through the pipe 35 into the tank 2. Pressure in this tank 2 will be relieved through the pipe 35, the top chamber in the casing l3 and by the valve IS. The float 38 then drops and when it hits the lower stop 48 the rod 39 will move the valve 27 to the opposite position shown in Figure 1 so that the steam will enter the top of the cylinder 23 and depress the piston 24 which will close the valve 26 on the seat 9 and as the stem 25 strikes the upper end of the valve I 2 said valve will be open so that any pressure in the tank 5 can escape. This downward movement of the piston 24 also moves the valve l5 off 50 its seat and closes the valve l9 so that steam can pass through the casing l3 by the valve l5 and pass to the top of the tank 2 through the pipe 35, thus supplying pressure to the water in the tank 2 which will force it into the boiler. The

introduction of steam into the top of the tank 2 will make the pressure in the tank equal to that of the boiler so that the water will enter the boiler from the tank 2 by gravity, the pressure being held in the boiler by the check valve 4. Then the operation begins all over again.

As will be seen the tank 5 and tank 2 are exhausted so that water can enter them against nothing more than atmospheric pressure as is apparent in tank 5, or atmospheric pressure plus its weight as is the case of tank 2.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What is claimed is:

1. A water feeding device for steam generators comprising a tank located above the generator and in communication therewith, a lower tank, means for feeding water thereinto by the action of gravity, a pipe having a check valve therein connecting the two tanks together, a float in the lower tank and means controlled by the movement of the float for introducing steam into the lower tank to force the water therefrom into the upper tank while communicating the top of the upper tank to the atmosphere and then communicating the top of the lower tank with the atmosphere while introducing steam into the top of the upper tank.

2. Means for feeding water to a steam generator comprising a tank above the generator and having its lower end in communication with the generator, a lower tank, means for introducing water into the lower tank by the action of gravity, a pipe connecting the bottom of the lower tank with the top of the upper tank, said pipe containing a check valve closing toward the lower tank, a float in the lower tank, a rod passing into the lower tank and having upper and lower stops thereon engaged by the float, a cylinder, a piston therein, a chest, said cylinder having passages connecting the chest with the ends of the cylinder and an exhaust port, a valve in the chest connected to the float rod for controlling the passages and port, means for introducing steam into the chest from the generator, upper and lower valve casings, rods connected with the piston and. entering the casings, valves on said rods located in the casings, a spring-pressed downwardly closing exhaust valve in the lower end of the lower valve casing, a pipe connecting the lower part of the casing with the upper end of the lower tank, a pipe connecting the lower casing above the valve seat for the valve connected with the rod with the generator, the upper valve casing having an exhaust port in its top, a valve connected with the piston rod for closing said port, spring means for normally holding said valve in closed position and the other valve in the upper casing in open position, means for introducing steam from the generator into the upper casing below the last-mentioned valve, and means for connecting said valve casing above the last-mentioned valve to the top of the upper tank.

MILES C. TREMBLAY. 

